AndroidTreeView
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bmelnychuk
viewHolder display problem
Hello,
what i want to do is a treeView in wich each item has an imageView and a TextView. The problem is that when i want to put the treeView inside the container (FrameLayout) by using this command:
menuContainer.addView(treeView.getView());
I have this error:
"The specified child already has a parent. You must call removeView() on the child's parent first."
So i try like this :
menuContainer.addView(treeMenuAdapter.getView());
treeMenuAdapter is my custom viewHolder, But only the last element is display.
here is all the code : CreatingNode and Tree : `public void GeometrieGraphicTool(){ FrameLayout menuContainer = (FrameLayout) this.findViewById(R.id.toolContainer);
TreeNode root = TreeNode.root();
TreeMenuAdapter treeMenuAdapter = new TreeMenuAdapter(this);
TreeMenuItem nodeItem = new TreeMenuItem();
//création des noeuds
nodeItem.text=getString(R.string.geometrie);
TreeNode geometrieNode = new TreeNode(nodeItem).setViewHolder(treeMenuAdapter);
nodeItem.icon = R.drawable.tracer;
nodeItem.text = getString(R.string.tracer);
TreeNode tracerNode = new TreeNode(nodeItem).setViewHolder(treeMenuAdapter);
nodeItem.icon=R.drawable.droite;
nodeItem.text=getString(R.string.droite);
TreeNode droiteNode = new TreeNode(nodeItem).setViewHolder(treeMenuAdapter);
nodeItem.icon=R.drawable.segment;
nodeItem.text= getString(R.string.segment);
TreeNode segmentNode =new TreeNode(nodeItem).setViewHolder(treeMenuAdapter);
nodeItem.icon= R.drawable.angle;
nodeItem.text=getString(R.string.angle);
TreeNode angleNode = new TreeNode(nodeItem).setViewHolder(treeMenuAdapter);
nodeItem.icon=R.drawable.cercle;
nodeItem.text = getString(R.string.cercle);
TreeNode cercleNode =new TreeNode(nodeItem).setViewHolder(treeMenuAdapter);
nodeItem.text = getString(R.string.outil);
TreeNode outilNode =new TreeNode(nodeItem).setViewHolder(treeMenuAdapter);
nodeItem.icon=R.drawable.equerre;
nodeItem.text=getString(R.string.equerre);
TreeNode equerreNode =new TreeNode(nodeItem).setViewHolder(treeMenuAdapter);
nodeItem.icon=R.drawable.compas;
nodeItem.text=getString(R.string.compas);
TreeNode compasNode=new TreeNode(nodeItem).setViewHolder(treeMenuAdapter);
nodeItem.icon =R.drawable.polygone;
nodeItem.text = getString(R.string.polygone);
TreeNode polygoneNode =new TreeNode(nodeItem).setViewHolder(treeMenuAdapter);
nodeItem.icon=R.drawable.triangle;
nodeItem.text=getString(R.string.triangle);
TreeNode triangleNode=new TreeNode(nodeItem).setViewHolder(treeMenuAdapter);
nodeItem.icon=R.drawable.rectangle;
nodeItem.text=getString(R.string.quadrilatère);
TreeNode quadrilatereNode =new TreeNode(nodeItem).setViewHolder(treeMenuAdapter);
nodeItem.text =getString(R.string.autre);
TreeNode autreNode =new TreeNode(nodeItem).setViewHolder(treeMenuAdapter);
nodeItem.text = getString(R.string.symetrie);
TreeNode symetrieNode=new TreeNode(nodeItem).setViewHolder(treeMenuAdapter);
nodeItem.icon= R.drawable.translation;
nodeItem.text= getString(R.string.translation);
TreeNode translationNode = new TreeNode(nodeItem).setViewHolder(treeMenuAdapter);
nodeItem.icon=R.drawable.symetrie_axial;
nodeItem.text=getString(R.string.axial);
TreeNode axialNode = new TreeNode(nodeItem).setViewHolder(treeMenuAdapter);
nodeItem.icon = R.drawable.rotation;
nodeItem.text = getString(R.string.rotation);
TreeNode rotationNode = new TreeNode(nodeItem).setViewHolder(treeMenuAdapter);
nodeItem.icon= R.drawable.rotation_point;
nodeItem.text=getString(R.string.autourPoint);
TreeNode autourPointNode = new TreeNode(nodeItem).setViewHolder(treeMenuAdapter);
nodeItem.icon=R.drawable.rotation_sommet;
nodeItem.text=getString(R.string.autourSommet);
TreeNode autourSommetNode = new TreeNode(nodeItem).setViewHolder(treeMenuAdapter);
nodeItem.icon=R.drawable.graphic;
nodeItem.text=getString(R.string.graphique);
TreeNode graphicNode = new TreeNode(nodeItem).setViewHolder(treeMenuAdapter);
nodeItem.icon= R.drawable.remplissage;
nodeItem.text=getString(R.string.remplissage);
TreeNode remplissageNode = new TreeNode(nodeItem).setViewHolder(treeMenuAdapter);
nodeItem.text = getString(R.string.creationGraphique);
TreeNode creationGraphiqueNode = new TreeNode(nodeItem).setViewHolder(treeMenuAdapter);
nodeItem.icon=R.drawable.graphique_courbe;
nodeItem.text = getString(R.string.courbe);
TreeNode graphicCourbeNode = new TreeNode(nodeItem).setViewHolder(treeMenuAdapter);
nodeItem.icon = R.drawable.histogramme;
nodeItem.text = getString(R.string.histogramme);
TreeNode graphicHistogrammeNode = new TreeNode(nodeItem).setViewHolder(treeMenuAdapter);
nodeItem.icon = R.drawable.graphique_secteur;
nodeItem.text= getString(R.string.secteur);
TreeNode secteurGraphiqueNode = new TreeNode(nodeItem).setViewHolder(treeMenuAdapter);
//création de l'arborescence
root.addChildren(geometrieNode, graphicNode);
geometrieNode.addChildren(tracerNode,symetrieNode,remplissageNode);
graphicNode.addChildren(remplissageNode, creationGraphiqueNode);
tracerNode.addChildren(droiteNode, segmentNode, angleNode, cercleNode, outilNode, polygoneNode);
symetrieNode.addChildren(translationNode, axialNode, rotationNode);
creationGraphiqueNode.addChildren(graphicCourbeNode, graphicHistogrammeNode, secteurGraphiqueNode);
outilNode.addChildren(equerreNode, compasNode);
polygoneNode.addChildren(triangleNode, quadrilatereNode, autreNode);
rotationNode.addChildren(autourPointNode, autourSommetNode);
AndroidTreeView treeView = new AndroidTreeView(this,root);
treeView.setDefaultAnimation(true);
menuContainer.addView(treeMenuAdapter.getView());
}`
and here is my custom holder: `public class TreeMenuAdapter extends TreeNode.BaseNodeViewHolder<TreeMenuItem>{ private Context context;
public TreeMenuAdapter(Context context) {
super(context);
this.context = context;
}
@Override
public View createNodeView(TreeNode node, TreeMenuItem value) {
final LayoutInflater inflater = LayoutInflater.from(context);
final View view = inflater.inflate(R.layout.tree_menu_item, null, false);
ImageView imageView = (ImageView)view.findViewById(R.id.TreeItemImage);
TextView textView = (TextView) view.findViewById(R.id.TreeItemText);
imageView.setImageResource(value.icon);
textView.setText(value.text);
return view;
}
}`
thank you for reading me and have a nice day.
ps: sorry if my English is bad I'm a Belgian student
I think the problem is in your TreeMenuAdapter. ViewHolder instance should not be re-used for each node, you need to create new object every time, or
setDefaultViewHolder(Class<? extends TreeNode.BaseNodeViewHolder> viewHolder) {
to set default view holder for each node, and library will create objects for you
